Dowsil DOW2938863 Firestop 400 Acrylic Sealant White 380ml Dowsil Firestop 400 is an intumescent acrylic sealant for internal applications. Developed to maintain the integrity of fire walls or partitions, it does not emit halogenated by-products under fire conditions. Resists mildew and mould growth. Tested to BS 476 Part 22: 1987 and BS 476 Part 7: 1987. A 2 hour fire rating can be achieved.
